计算题 要详细步骤(n-3)/(m-1)*(-2)=-1 2*(m+1)/2+(n+3)/2+5=0 联立方程组算出m和n

(n-3)/(m-1)×(-2)=-1①
2(m+1)/2+(n+3)/2+5=0②
将①②整理化简为③④
-2(n-3)=-(m-1)
-2n+6=-m+1
m-2n=-5③
2(m+1)+n+3+10=0
2m+2+n+3+10=0
2m+n=-15
n=-2m-15④
将④代入③
m-2(-2m-15)=-5
m+4m+30=-5
5m=-5-30
5m=-35
m=-7⑤
将⑤代入④
n=14-15=-1
解得m=-7
n=-1

(n-3)/(m-1)*(-2)=-1 (2n-6)/(m-1)=12n-6=m-1m=2n-5 (1)2*(m+1)/2+(n+3)/2+5=0(m+1)+(n+3)/2+5=02(m+1)+(n+3)+10=02m+n+15=0 (2)把(1)代入(2),2(2n-5)+n+15=05n+5=0n=-1m=2×(-1)-5=-7方程组的解为 m=-7 ,n=-1...